leds: various: fix OF node leaks

Fix OF node leaks by calling of_node_put in
for_each_available_child_of_node when the cycle breaks or returns.

Signed-off-by: Marek Behún <[e-mail]>
Cc: Nikita Travkin <[e-mail]>
Cc: Milo Kim <[e-mail]>
Cc: Dan Murphy <[e-mail]>
Signed-off-by: Pavel Machek <[e-mail]>
Not-for-stable: untested, theoretical, insignificant leaks

drivers/leds/leds-aw2013.c

···
 
 		ret = devm_led_classdev_register_ext(&chip->client->dev,
 						     &led->cdev, &init_data);
-		if (ret < 0)
+		if (ret < 0) {
+			of_node_put(child);
 			return ret;
+		}
 
 		i++;
 	}

drivers/leds/leds-lp55xx-common.c

···
 	for_each_available_child_of_node(np, child) {
 		ret = lp55xx_parse_multi_led_child(child, cfg, child_number,
 						   num_colors);
-		if (ret)
+		if (ret) {
+			of_node_put(child);
 			return ret;
+		}
 		num_colors++;
 	}
 
···
 
 	for_each_available_child_of_node(np, child) {
 		ret = lp55xx_parse_logical_led(child, cfg, i);
-		if (ret)
+		if (ret) {
+			of_node_put(child);
 			return ERR_PTR(-EINVAL);
+		}
 		i++;
 	}
 

drivers/leds/leds-turris-omnia.c

···
 	led = &leds->leds[0];
 	for_each_available_child_of_node(np, child) {
 		ret = omnia_led_register(client, led, child);
-		if (ret < 0)
+		if (ret < 0) {
+			of_node_put(child);
 			return ret;
+		}
 
 		led += ret;
 	}